Selective electric control system



v C 1,645,619 Oct. 18,1927. SOLSON SELECTIVE ELECTRIC CONTROL SYSTEM Filed Jan. 2, 1926 ma ma-r Patented Oct. 18, 1927. y UNITED "STATE meat OLSON, or can ranx, ILLINOIS, lemmaTasmanian sedan-m,

OF CHICAGO, ILLIHOISJA. CORBQRATIQN?F-ILLINOISn snnnc'rrvi: ntncmrc Application filed January ments in combination as herein shown and described and as indicated by the claims.

In the drawings:

Figure 1 is in the nature of a vertical section illustratin a portion of an elevator with this invention applied thereto.

Figure 2 is a detail view showing the interior construction of a limit switch used as an element of the control,

Figure 1 shows a portion of .an elevator of the generaltype more fully described in my Patent No. 1,325,857 issued December 23,

1919 in which two pairs of chains are mounted for parallel travel and are provided with transversely disposed flights in the form of angle rails which are adapted to support loads such as trays, extending transversely from one pair of chains to the other. The, 7 drawing shows only one pair of the chains 10, of such an elevator, but includes the angular flights, 12, attached thereto. One of the trays is shown in full lines at 3 and in dotted lines at 13, the position of the same tray is indicated as it arrives at the station opening, 14, at which, it operates to stop, the movement of the elevator so that the tray may be manuallyremoved by an attendant. An elevatorof this character is frequently employed in a'building such as a hotel for conveying loaded trays to the various floors for delivering meals to nests in their rooms; I theopenings, 14, may e understood therefore as each representing an access opening a in the'wall at a different floor level traversed by the elevator.

The power for driving the elevator is supplied by a motor 15, receiving its current through a starting box or 'rheostat, 16, of any suitable type. Inaddition to the starting box, 16, I provide a control board, 17,-

having av swinging switch, arm, 18, which may connect at will with anyaof a number of w contacts, preferably marked with the numcorrespond, as, 1, 2, 3, 4, as shown in the drawing. The arrow X, indicates that the normal direction of travel of the elevator isupward. The current supply wires leading 5 from the starting box, 16-, compris e a wire,

bers of the respective floors to which they iaai.fieaexam 3 connected to the swinging switch 18,

an s nd wir extend t hemqwr; F m eachf th .P n .a ifi "'f all. g' xt jdsj man of h i fi ti wit s, I CsIDa'W QSs Q rated 1;; j E 176: "Ei 'i i 'tchli id lev rm 9' l y'eite'nd lth ath pfupwa dtm loith "t ay: i by fl ghts, 12,7 1 thejelevato ,1

tr ysw l d fle t th s l ve I ,lpass- E cep h i thL deflected, eachfof ftheflimitf o, ,D,,prov ides a: painter a metric geu'rre pjrom thef,.board,.f1f7 t @FQr exampl w l ti embe g 1510 v A i W re; 5, 111 which extends to] the mot I. illustrated, in] .jFi g'ii arranged to, auto atica e'nl l ais es j amt l9; of 1 tiq ungsh w a a my; 1 1' the- ;:1 with the er inali e' gth;wire oejyla the swit h C 'o thatiiptilt Y a t e p9 shown-at '3; t the marq is, ma le 2 li it sw ts hg05 wae; 2 v,

21. As" the tray reaches. t1;

moto rl l5.

tol

contact with the tray, 3, the p1 med out of contact with the arms,

alii onsa caonis i' ndi-q,

sfrom the Leon-1,5

25, thus breaking the motor circuit and cansing the mechanism to come to rest. Within the casing of switch, C, a spring, .29, is arranged to return the arm, 19, yieldingly to its normal osition so as to complete the circu'it throng theparts, 24, 26 and 25, as soon as the tray, 3, is removed from the elevator, .thus automatically causing the chains, 10, and flights, 12, to resume their upward motion.

Since the chains, 10, are endless, it is not necessary .to provide for reversing-the direction of drive of the motor, 15. When another'tray is to be elevated to the same or a .difierent floor, the control switch arm, 18, is merely set into contact with the terminal corresponding to the desired floor or station, and the motor is then started by means of the switch, 16; the limit switch thus included in the circuit is relied upon to stop the mechanism when the tray has reached the chosen station.

I claim 1. In combination with an endless conveyer and driving means therefor, a plurality of stations associated .with the conveyer, a member adjacent each station in osition to engage a load on the conveyer, an means at a distance from the stations adjustable to co-operate with such member at any selected station and adapted to stop the conve er when the load arrives at the selected station and engages the said member, said member being adapted to start said conveyer when the load is removed therefrom.

2. In combination with an endless conveyer and means for driving it, a plurality of stations, a member associated with each station in position to engage a load on'the conveyer, a control board at a distance from the stations having aplurality of terminals electrically connected respectivel with said members at the stations, and also aving electrical connection with means controlling the driv' means, and a selecting device at the conti' oI-board through which the said member at any selected station may be connected for controlling the drive to sto the conveyer when a load arrives at the selected station, together with means associated with each of said members for automaticall said conveyor in motion after said load is removed therefrom.

3. In combination with an endless conveyer, an electric motor for driving it,'and

a pluralit of stations associated with the conveyer, he -motor circuit including a-wire having branches extending through switches adjacent the respective stations and thence to a series of grouped contacts, together with a selector switch co-operating with said grouped contacts for placing any one of the starting 4. In combination with an elevator, driving means therefor, and a pluralit of stations, a member associated with eac station in position to engage a load on the elevator, means at a distance from the stations adjustable to co-operate with an selected one of said members and adapte to stop the elevator when the load engages the selected member, said selected member being provided with automatic means for starting said elevator after the load is removed therefrom.

5. In combination with an elevator comprising parallel endless belts spaced apart and provided with flights project toward each other for supporting trays whi bridge the space between the belts, a plurality of stations associated therewith, an electric -motor for driving the belts, the motor circuit including a wire having branches extending through switches. at the respective stations, each switch havi an arm which projects. between the belts or contact with the trays or loads carried thereby, the arm being movable b such contact to open the switch, and sai branches extending from the switches to a control board having a contact corresponding to each branch, and a selector member in the motor circuit movable to engage any one of said contacts at will to adapt the switch at a selected station to be opened by the load for stopping the motor when the loadarrives at sai station.

' 6. The combination of an endless conveyer having driving means therefor and me associated therewith engageableby the load carried by the conveyer at prede termined points along the th of travel of the load whereby to stop t e conveyer until the load is removed therefrom.

. SAMUEL OLSON. 

